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    DISTRIBUTED RAMAN H2 SENSORS
    1.
    发明公开
    DISTRIBUTED RAMAN H2 SENSORS 审中-公开

    公开(公告)号：EP4428520A1

    公开(公告)日：2024-09-11

    申请号：EP24162400.6

    申请日：2024-03-08

    Applicant: ROSEMOUNT AEROSPACE INC.

    Inventor： RAY, Mark D.

    IPC: G01N21/03 ,  G01N21/65 ,  G01J3/02 ,  G01J3/44

    CPC classification number: G01N21/031 ,  G01N21/65 ,  G01N2201/083320130101 ,  G01J3/44 ,  G01J3/02 ,  G01N2021/65120130101 ,  G01J3/0218

    Abstract: A gas detection system includes a first optical fiber bundle (102) connected to a first multi-pass cell (104) for connecting the first multi-pass cell (104) to a Raman spectrum analyzer (106). A second optical fiber bundle (108) is connected to the first multi-pass cell (104) for connecting the first multi-pass cell (104) to a second multi-pass cell (110). The second optical fiber bundle (108) can include a delay coil configured to provide temporal spacing between spectral returns from the first multi-pass cell (104) and from the second multi-pass cell (110). The first and second multi-pass cells can be biconic multipass cells with a the first optical fiber bundle (102) directed toward a first D-mirror (126), which is directed toward a T-mirror (128), which is directed toward a second D-mirror (130), which is directed toward the second optical fiber bundle (108). The D-mirrors can be on an opposite end of the first multi-pass cell (104) from the T-mirror (128) and the first and second optical fiber bundles.

    OPTICAL SENSOR CHIP AND OPTICAL SENSING SYSTEM
    3.
    发明公开
    OPTICAL SENSOR CHIP AND OPTICAL SENSING SYSTEM 审中-实审

    公开(公告)号：EP4425150A1

    公开(公告)日：2024-09-04

    申请号：EP22884921.2

    申请日：2022-02-25

    Applicant: Silith Technology (Suzhou) Co., Ltd.

    Inventor： ZHANG, Xingyu

    IPC: G01N21/21

    CPC classification number: G02B27/283 ,  G02B27/286 ,  G02B6/126 ,  G02B2006/1211620130101 ,  G02B6/125 ,  G02B6/2726 ,  G02B6/2773 ,  G02B6/2766 ,  G01J1/0425 ,  G01J1/0429 ,  G01J3/0218 ,  G01J3/0224

    Abstract: The invention provides an optical sensor chip and an optical sensing system, wherein the optical sensor chip of the invention comprises a bottom cladding, a top cladding stacked on the bottom cladding and an optical waveguide core, the optical waveguide core is arranged between the top cladding and the bottom cladding, the top cladding is provided with an opened region for accommodating a sample to be tested, a part of the optical waveguide core is exposed through the opened region, the optical waveguide core comprises a first polarization rotator and a first polarization splitter, the first polarization splitter includes one input port and two output ports for outputting polarized light, the first polarization rotator is provided with a first end and a second end, the second end of the first polarization rotator is communicated with the input port of the first polarization splitter, and a dimension of the first polarization rotator gradually increases from the first end to the second end. The optical sensor chip of the invention can be designed in different sizes as required, does not need to be provided in a large volume, is convenient to use, does not need a tunable laser, and is low in cost.

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